LSAT-2-4-20再次请教，谢谢

20. Normal full-term babies are all born with certain instinctive reflexes that disappear by the age of two months. Because this three-month-old baby exhibits these reflexes, this baby is not a normal full-term baby.

Which one of the following has a logical structure most like that of the argument above?

(A) Because carbon dioxide turns limewater milky and this gas is oxygen, it will not turn limewater milky.

(B) Because no ape can talk and Suzy is an ape, Suzy cannot talk.

(C) Because humans are social animals and Henry is sociable, Henry is normal.

(D) Because opossums have abdominal pouches and this animal lacks any such pouch, this animal is not an opossum.

(E) Because some types of trees shed their leaves annually and this tree has not shed its leaves, it is not normal.

这题B为啥不对？它的LOGIC STRUCTURE 不怎么清楚